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#include "colmap/util/types.h"

#include <unordered_set>

#include <gtest/gtest.h>

namespace colmap {
namespace {

TEST(FeatureMatchHashing, Nominal) {
  std::unordered_set<std::pair<point2D_t, point2D_t>> set;
  set.emplace(1, 2);
  EXPECT_EQ(set.size(), 1);
  set.emplace(1, 2);
  EXPECT_EQ(set.size(), 1);
  EXPECT_EQ(set.count(std::make_pair(0, 0)), 0);
  EXPECT_EQ(set.count(std::make_pair(1, 2)), 1);
  EXPECT_EQ(set.count(std::make_pair(2, 1)), 0);
  set.emplace(2, 1);
  EXPECT_EQ(set.size(), 2);
  EXPECT_EQ(set.count(std::make_pair(0, 0)), 0);
  EXPECT_EQ(set.count(std::make_pair(1, 2)), 1);
  EXPECT_EQ(set.count(std::make_pair(2, 1)), 1);
}

}  // namespace
}  // namespace colmap
